20839962 has 64 divisors (see below), whose sum is σ = 49641984. Its totient is φ = 5749440.

The previous prime is 20839961. The next prime is 20839969. The reversal of 20839962 is 26993802.

It is a super-2 number, since 2×20839962² = 868608032322888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 20839962.

It is not an unprimeable number, because it can be changed into a prime (20839961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91693 + ... + 91919.

It is an arithmetic number, because the mean of its divisors is an integer number (775656).

Almost surely, 2^20839962 is an apocalyptic number.

20839962 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 20839962, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24820992).

20839962 is an abundant number, since it is smaller than the sum of its proper divisors (28802022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20839962 is a wasteful number, since it uses less digits than its factorization.

20839962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 20839962 is about 4565.0807221779. The cubic root of 20839962 is about 275.1897841468.

The spelling of 20839962 in words is "twenty million, eight hundred thirty-nine thousand, nine hundred sixty-two".